# Cairo Generic Data Types

> Explain Cairo generic data types and syntax for generic functions, structs, enums, methods, and impls; use when a request involves type parameters or generic signatures in Cairo.

- Skill: `teddyjfpender/cairo-generic-data-types` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add teddyjfpender/cairo-generic-data-types`
- Raw SKILL.md: https://api.skillmd.com/api/skills/teddyjfpender/cairo-generic-data-types/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: teddyjfpender (https://skillmd.com/u/teddyjfpender)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/teddyjfpender/cairo-generic-data-types

---


# Cairo Generic Data Types

## Overview
Explain how to declare and use generic types and functions in Cairo with correct syntax.

## Quick Use
- Read `references/generic-data-types.md` before answering.
- Show short examples for generic structs, enums, and functions.
- Use explicit type annotations when inference is ambiguous.

## Response Checklist
- Place generic parameters after the item name: `struct Name<T>` or `fn foo<T>()`.
- Support multiple parameters: `struct Pair<T, U>`.
- Emphasize that generics work with functions, structs, enums, traits, impls, and methods.

## Example Requests
- "How do I write a generic struct in Cairo?"
- "Can I have multiple type parameters?"
- "Why does the compiler need a type annotation for this generic?"

## Cairo by Example
- [Generics](https://cairo-by-example.xyz/generics)
- [Functions](https://cairo-by-example.xyz/generics/gen_fn)
- [Implementation](https://cairo-by-example.xyz/generics/impl)